Max和Sum mysql

Question

我从一个客户处获得所有订单，然后获得订单总和，然后获得最大订单。 我不能使用order by和limit。 我得到了结果，但我无法获得总和和最大值正常工作

这是我当前的查询：

SELECT SUM(Qty * UnitPrice) AS Total FROM `Details`
WHERE ONo IN (
    SELECT Orders.Ono
    FROM Orders, Customers
    WHERE Customers.FName = 'Charles' AND Customers.LName = 'Xavier' AND Customers.CNo = Orders.CNo
    GROUP BY Orders.ONo
)
GROUP BY ONo

Total
7.50
20.99
54.47
49.98
8.00

Answer 1

请尝试：

SELECT MAX(Total) as MaxTotal FROM (<your query comes here>) AS T